I have the Borgeson box in my Belvedere and it fits and drives very well. I also used the coupler from Bergman which also fit very well however I have had a persistent and annoying hiss when just off center of the box in slight turns or sitting at a red light without the wheel perfectly centered. I talked to Bergman and Borgeson and was told by Borgeson's tech that their coupler has a urethane section in the center to stop hydraulic noise from traveling through the column.

My box was put in about a year ago so not sure what generation it would be considered.